/* ========================================
   SKILLINFY TECH - ENHANCED PROFESSIONAL DESIGN
   Modern, Clean, Brand-Matched
   ======================================== */

/* ========================================
   CSS VARIABLES - Will be updated with logo colors
   ======================================== */
:root {
    /* Primary Brand Colors - UPDATE THESE WITH YOUR LOGO COLORS */
    --color-primary-900: #1a237e; /* Deep Blue - Replace with your primary */
    --color-primary-800: #283593;
    --color-primary-700: #303f9f;
    --color-primary-600: #3949ab;
    --color-primary-500: #3f51b5;
    
    --color-accent-600: #f57c00; /* Orange - Replace with your accent */
    --color-accent-500: #ff9800;
    --color-accent-400: #ffa726;
    
    /* Neutral Colors */
    --color-slate-50: #f8fafc;
    --color-slate-100: #f1f5f9;
    --color-slate-200: #e2e8f0;
    --color-slate-300: #cbd5e1;
    --color-slate-400: #94a3b8;
    --color-slate-500: #64748b;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-slate-800: #1e293b;
    --color-slate-900: #0f172a;
    
    --color-white: #ffffff;
    --color-black: #000000;
    
    /* Typography - Professional Sans-Serif Stack */
    --font-heading: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Layout */
    --max-width: 1280px;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.14);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.18);
}

/* ========================================
   BASE STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-slate-800);
    background: var(--color-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-slate-900);
}

h1 {
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    font-weight: 800;
    margin-bottom: var(--space-6);
}

h2 {
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--space-5);
}

h3 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.text-center {
    text-align: center;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-accent-600);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-5);
}

.section-label::before {
    content: '';
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-600), var(--color-accent-400));
    border-radius: 2px;
}

.section-title {
    margin-bottom: var(--space-6);
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-slate-600);
    max-width: 700px;
    margin: 0 auto var(--space-12);
    line-height: 1.8;
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-slate-200);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.98);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-5);
    padding-bottom: var(--space-5);
}

.logo {
    max-height: 50px;
    width: auto;
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    color: var(--color-slate-700);
    font-size: 0.95rem;
    font-weight: 600;
    position: relative;
    padding: var(--space-2) 0;
    transition: color var(--transition-base);
}

.nav-link:hover {
    color: var(--color-primary-600);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--color-accent-600);
    border-radius: 2px;
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-500));
    color: var(--color-white) !important;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--color-primary-800), var(--color-primary-600));
}

.nav-cta::after {
    display: none;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--space-2);
}

.hamburger span {
    width: 26px;
    height: 3px;
    background: var(--color-primary-700);
    transition: all var(--transition-base);
    border-radius: 2px;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero-section {
    margin-top: 80px;
    padding: clamp(5rem, 12vw, 9rem) 0 clamp(4rem, 10vw, 7rem);
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--color-slate-50) 0%, var(--color-white) 100%);
}

/* Decorative Background */
.hero-section::before {
    content: '';
    position: absolute;
    top: -400px;
    right: -400px;
    width: 900px;
    height: 900px;
    background: radial-gradient(circle, rgba(63, 81, 181, 0.08) 0%, rgba(255, 152, 0, 0.05) 50%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    animation: float 20s ease-in-out infinite;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -200px;
    left: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 152, 0, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    animation: float 25s ease-in-out infinite reverse;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    animation: fadeInUp 0.8s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-6);
    background: linear-gradient(135deg, rgba(63, 81, 181, 0.1), rgba(255, 152, 0, 0.1));
    color: var(--color-primary-800);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-8);
    border-radius: 50px;
    border: 2px solid rgba(63, 81, 181, 0.2);
}

.hero-badge::before {
    content: '✦';
    color: var(--color-accent-600);
    font-size: 1.2rem;
}

.hero-title {
    margin-bottom: var(--space-6);
    line-height: 1.1;
    background: linear-gradient(135deg, var(--color-primary-900) 0%, var(--color-primary-600) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--color-slate-600);
    line-height: 1.8;
    margin-bottom: var(--space-10);
    max-width: 580px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* Enhanced Static Stats - No Animation */
.hero-stats-wrapper {
    position: relative;
    animation: fadeInUp 0.8s ease-out 0.3s backwards;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    background: var(--color-white);
    padding: var(--space-10);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.hero-stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--color-primary-600), var(--color-accent-600), var(--color-primary-600));
    background-size: 200% 100%;
    animation: shimmer 4s linear infinite;
}

.stat-item {
    text-align: center;
    padding: var(--space-5);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
    background: linear-gradient(135deg, transparent, rgba(63, 81, 181, 0.02));
}

.stat-item:hover {
    transform: translateY(-5px);
    background: linear-gradient(135deg, rgba(63, 81, 181, 0.05), rgba(255, 152, 0, 0.03));
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary-700), var(--color-accent-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    line-height: 1;
    margin-bottom: var(--space-3);
}

/* Add + symbol after number */
.stat-number::after {
    content: '+';
    margin-left: 4px;
}

.stat-label {
    color: var(--color-slate-600);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: 1.1rem 2.5rem;
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 400px;
    height: 400px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-500));
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--color-primary-800), var(--color-primary-600));
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-primary-700);
    border: 2px solid var(--color-primary-700);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--color-primary-700);
    color: var(--color-white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--color-slate-700);
    border: 2px solid var(--color-slate-300);
}

.btn-outline:hover {
    border-color: var(--color-primary-700);
    color: var(--color-primary-700);
    background: rgba(63, 81, 181, 0.05);
}

/* ========================================
   FEATURES SECTION
   ======================================== */
.features-section {
    background: linear-gradient(180deg, var(--color-primary-900), var(--color-primary-800));
    color: var(--color-white);
    padding: var(--space-20) 0;
    position: relative;
    overflow: hidden;
}

.features-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent-600), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-12);
    text-align: center;
}

.feature-item {
    padding: var(--space-8);
    position: relative;
    transition: transform var(--transition-base);
    border-radius: var(--border-radius-md);
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--color-accent-600);
    border-radius: 2px;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-item:hover::before {
    opacity: 1;
}

.feature-item:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.05);
}

.feature-item h3 {
    color: var(--color-accent-400);
    font-size: 2rem;
    margin-bottom: var(--space-4);
    font-weight: 700;
}

.feature-item p {
    color: var(--color-slate-200);
    font-size: 1rem;
    margin: 0;
    line-height: 1.7;
}

/* ========================================
   INTERNSHIPS SECTION
   ======================================== */
.internships-section {
    padding: var(--space-24) 0;
    background: var(--color-white);
}

.section-header {
    max-width: 700px;
    margin: 0 auto var(--space-16);
    text-align: center;
}

.internships-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: var(--space-10);
}

.internship-card {
    padding: var(--space-10);
    background: var(--color-white);
    border: 2px solid var(--color-slate-200);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.internship-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--color-primary-600), var(--color-accent-600));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.internship-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(135deg, rgba(63, 81, 181, 0.03), rgba(255, 152, 0, 0.02));
    opacity: 0;
    transition: opacity var(--transition-base);
    border-radius: var(--border-radius-lg);
}

.internship-card:hover::before {
    transform: scaleX(1);
}

.internship-card:hover::after {
    opacity: 1;
}

.internship-card:hover {
    border-color: var(--color-primary-600);
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.internship-card h3 {
    margin-bottom: var(--space-5);
    font-size: 1.75rem;
    position: relative;
    z-index: 1;
    color: var(--color-slate-900);
}

.internship-card p {
    color: var(--color-slate-600);
    margin-bottom: var(--space-6);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    position: relative;
    z-index: 1;
}

.tech-tag {
    padding: 0.6rem 1.2rem;
    background: var(--color-slate-100);
    color: var(--color-primary-700);
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-slate-200);
    transition: all var(--transition-fast);
}

.tech-tag:hover {
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-accent-600));
    color: var(--color-white);
    border-color: transparent;
    transform: translateY(-2px);
}

.card-link {
    color: var(--color-primary-700);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
    font-size: 1.05rem;
}

.card-link:hover {
    gap: var(--space-5);
    color: var(--color-accent-600);
}

.card-link::after {
    content: '→';
    font-size: 1.4rem;
    transition: transform var(--transition-base);
}

.card-link:hover::after {
    transform: translateX(5px);
}

/* ========================================
   PROCESS SECTION
   ======================================== */
.process-section {
    background: linear-gradient(180deg, var(--color-slate-50), var(--color-white));
    padding: var(--space-24) 0;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-12);
    margin-top: var(--space-16);
}

.process-step {
    position: relative;
    padding: var(--space-10);
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--color-slate-200);
    transition: all var(--transition-base);
}

.process-step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(63, 81, 181, 0.04), rgba(255, 152, 0, 0.02));
    border-radius: var(--border-radius-lg);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.process-step:hover {
    border-color: var(--color-primary-600);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.process-step:hover::before {
    opacity: 1;
}

.step-number {
    font-family: var(--font-heading);
    font-size: 5.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-accent-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    line-height: 1;
    margin-bottom: var(--space-5);
}

.process-step h3 {
    margin-bottom: var(--space-4);
    font-size: 1.75rem;
    position: relative;
    z-index: 1;
}

.process-step p {
    color: var(--color-slate-600);
    margin: 0;
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

/* ========================================
   TESTIMONIALS SECTION
   ======================================== */
.testimonials-section {
    padding: var(--space-24) 0;
    background: var(--color-white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: var(--space-10);
    margin-top: var(--space-16);
}

.testimonial-card {
    padding: var(--space-12);
    background: linear-gradient(135deg, var(--color-white), var(--color-slate-50));
    border: 2px solid var(--color-slate-200);
    border-radius: var(--border-radius-lg);
    position: relative;
    transition: all var(--transition-base);
    overflow: hidden;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -15px;
    left: 30px;
    font-family: var(--font-heading);
    font-size: 9rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-accent-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.12;
    line-height: 1;
    z-index: 0;
}

.testimonial-card:hover {
    border-color: var(--color-primary-600);
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    background: var(--color-white);
}

.testimonial-text {
    font-size: 1.125rem;
    line-height: 2;
    color: var(--color-slate-700);
    margin-bottom: var(--space-10);
    position: relative;
    z-index: 1;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding-top: var(--space-6);
    border-top: 3px solid var(--color-slate-200);
    position: relative;
    z-index: 1;
}

.author-info h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-slate-900);
    margin-bottom: 0.25rem;
}

.author-info p {
    font-size: 1rem;
    color: var(--color-accent-600);
    margin: 0;
    font-weight: 600;
}

/* ========================================
   DURATION SECTION
   ======================================== */
.duration-section {
    background: linear-gradient(180deg, var(--color-primary-900), var(--color-primary-800));
    color: var(--color-white);
    padding: var(--space-24) 0;
    position: relative;
    overflow: hidden;
}

.duration-section::before {
    content: '';
    position: absolute;
    top: -300px;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 900px;
    background: radial-gradient(circle, rgba(255, 152, 0, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.duration-section .section-label {
    color: var(--color-accent-400);
}

.duration-section .section-label::before {
    background: var(--color-accent-400);
}

.duration-section .section-title,
.duration-section .section-description {
    color: var(--color-white);
}

.duration-section .section-description {
    color: var(--color-slate-200);
}

.duration-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-10);
    margin-top: var(--space-16);
    position: relative;
    z-index: 1;
}

.duration-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: var(--space-12);
    border: 2px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.duration-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.1), rgba(63, 81, 181, 0.1));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.duration-card.featured {
    background: linear-gradient(135deg, var(--color-white), var(--color-slate-50));
    color: var(--color-slate-900);
    transform: scale(1.05);
    border: 3px solid var(--color-accent-600);
    box-shadow: var(--shadow-xl);
}

.duration-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--color-accent-600);
    box-shadow: var(--shadow-xl);
}

.duration-card:hover::before {
    opacity: 1;
}

.duration-card.featured:hover {
    transform: scale(1.08) translateY(-10px);
}

.card-header {
    margin-bottom: var(--space-10);
    position: relative;
    z-index: 1;
}

.card-header h3 {
    color: var(--color-white);
    margin-bottom: var(--space-4);
    font-size: 2rem;
}

.duration-card.featured .card-header h3 {
    color: var(--color-slate-900);
}

.duration-badge {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    background: linear-gradient(135deg, var(--color-accent-600), var(--color-accent-500));
    color: var(--color-white);
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: 50px;
    box-shadow: var(--shadow-md);
}

.duration-card.featured .duration-badge {
    background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-600));
}

.card-features {
    margin-bottom: var(--space-10);
    position: relative;
    z-index: 1;
}

.card-features ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.card-features li {
    color: var(--color-slate-200);
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    line-height: 1.7;
    font-size: 1rem;
}

.duration-card.featured .card-features li {
    color: var(--color-slate-700);
}

.card-features li i {
    color: var(--color-accent-400);
    margin-top: 3px;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.apply-duration-btn {
    width: 100%;
    padding: 1.25rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.08));
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    font-weight: 800;
    font-size: 1.05rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.apply-duration-btn:hover {
    background: linear-gradient(135deg, var(--color-accent-600), var(--color-accent-500));
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.duration-card.featured .apply-duration-btn {
    background: linear-gradient(135deg, var(--color-accent-600), var(--color-accent-500));
    border-color: transparent;
}

.duration-card.featured .apply-duration-btn:hover {
    background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-600));
}

.additional-options {
    margin-top: var(--space-16);
    text-align: center;
    position: relative;
    z-index: 1;
}

.option-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-5);
    flex-wrap: wrap;
}

.secondary-btn {
    padding: 1.1rem 2.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    font-weight: 700;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
}

.secondary-btn:hover {
    background: linear-gradient(135deg, var(--color-accent-600), var(--color-accent-500));
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   FAQ SECTION
   ======================================== */
.faq-section {
    padding: var(--space-24) 0;
    background: linear-gradient(180deg, var(--color-slate-50), var(--color-white));
}

.faq-grid {
    max-width: 900px;
    margin: var(--space-16) auto 0;
}

.faq-item {
    margin-bottom: var(--space-6);
    border: 2px solid var(--color-slate-200);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    background: var(--color-white);
}

.faq-item:hover {
    border-color: var(--color-primary-600);
    box-shadow: var(--shadow-md);
}

.faq-item.active {
    border-color: var(--color-primary-600);
    box-shadow: var(--shadow-lg);
}

.faq-question {
    padding: var(--space-8);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-5);
    background: var(--color-white);
    transition: all var(--transition-base);
}

.faq-question:hover {
    background: var(--color-slate-50);
}

.faq-item.active .faq-question {
    background: linear-gradient(135deg, rgba(63, 81, 181, 0.05), rgba(255, 152, 0, 0.03));
}

.faq-question h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0;
    color: var(--color-slate-900);
}

.faq-question i {
    color: var(--color-accent-600);
    font-size: 1.4rem;
    transition: transform var(--transition-base);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-answer p {
    padding: 0 var(--space-8) var(--space-8);
    color: var(--color-slate-600);
    line-height: 1.9;
    margin: 0;
    font-size: 1.05rem;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: linear-gradient(180deg, var(--color-primary-900), var(--color-slate-900));
    color: var(--color-slate-300);
    padding: var(--space-24) 0 var(--space-12);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent-600), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-16);
    margin-bottom: var(--space-16);
}

.footer-section h3 {
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--space-6);
}

.footer-section p {
    color: var(--color-slate-300);
    line-height: 1.8;
    margin-bottom: var(--space-6);
}

.footer-section ul li {
    margin-bottom: var(--space-3);
}

.footer-section ul li a {
    color: var(--color-slate-300);
    font-size: 0.95rem;
    transition: all var(--transition-base);
    display: inline-block;
}

.footer-section ul li a:hover {
    color: var(--color-accent-400);
    transform: translateX(5px);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-slate-300);
    font-size: 0.95rem;
    transition: all var(--transition-base);
}

.contact-item:hover {
    color: var(--color-accent-400);
}

.contact-item i {
    color: var(--color-accent-500);
    width: 22px;
    font-size: 1.1rem;
}

.social-links {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
    border: 2px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-sm);
    color: var(--color-slate-300);
    transition: all var(--transition-base);
    font-size: 1.2rem;
}

.social-link:hover {
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-accent-600));
    color: var(--color-white);
    border-color: transparent;
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.footer-divider {
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    margin: var(--space-16) 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-8);
}

.footer-bottom-content p {
    margin: 0;
    color: var(--color-slate-400);
    font-size: 0.95rem;
}

.footer-bottom-links {
    display: flex;
    gap: var(--space-8);
}

.footer-bottom-links a {
    color: var(--color-slate-400);
    font-size: 0.95rem;
    transition: color var(--transition-base);
}

.footer-bottom-links a:hover {
    color: var(--color-accent-400);
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-600));
    color: var(--color-white);
    border-radius: var(--border-radius-md);
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 999;
    box-shadow: var(--shadow-xl);
    border: 2px solid rgba(255, 255, 255, 0.2);
    font-size: 1.3rem;
}

.back-to-top.visible {
    display: flex;
}

.back-to-top:hover {
    background: linear-gradient(135deg, var(--color-accent-600), var(--color-accent-500));
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(255, 152, 0, 0.3);
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(5deg);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

[data-aos] {
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(40px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: var(--space-12);
        transition: left var(--transition-base);
        align-items: flex-start;
        gap: var(--space-8);
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .internships-grid,
    .testimonials-grid,
    .process-grid,
    .duration-grid {
        grid-template-columns: 1fr;
    }
    
    .duration-card.featured {
        transform: scale(1);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .hero-buttons,
    .option-buttons {
        flex-direction: column;
    }
    
    .btn,
    .secondary-btn {
        width: 100%;
        justify-content: center;
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

a:focus,
button:focus {
    outline: 3px solid var(--color-accent-500);
    outline-offset: 3px;
}